[PATCH 0/7] drm/msm/dpu: simplify VBIF handling
From: Dmitry Baryshkov
Date: Fri Feb 27 2026 - 13:36:59 EST
Once Konrad asked, what is the use for VBIF_NRT. Answering to his
question revealed that it's not actually used by the DPU driver.
There are two VBIF interfaces two memory, VBIF_RT and VBIF_NRT with
VBIF_NRT being used only for the offscreen rotator, a separate block
performing writeback operation with the optional 90 degree rotation.
This block will require a separate isntance of the DPU driver, and it is
not supported at this point.
The only exception to that rule is MSM8996, where VBIF_NRT has also been
used for outputting all writeback data. The DPU driver don't support WB
on that platform and most likely will not in the close feature.
The missing features don't match the extra complexity required to
support two VBIF interfaces, so drop the second one and all the options
to support it.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxxxxxxxx>
---
Dmitry Baryshkov (7):
drm/msm/dpu: drop VBIF_NRT handling
drm/msm/dpu: stop declaring VBIFs as an array in catalog
drm/msm/dpu: replace VBIF-related array with bare pointers
drm/msm/dpu: drop VBIF id, base and name from the catalog
drm/msm/dpu: drop vbif_idx from WB configuration
drm/msm/dpu: drop VBIF index from the VBIF params
drm/msm/dpu: drop VBIF index from the struct dpu_hw_vbif
.../drm/msm/disp/dpu1/catalog/dpu_10_0_sm8650.h | 4 +-
.../drm/msm/disp/dpu1/catalog/dpu_12_0_sm8750.h | 4 +-
.../drm/msm/disp/dpu1/catalog/dpu_12_2_glymur.h | 4 +-
.../drm/msm/disp/dpu1/catalog/dpu_13_0_kaanapali.h | 4 +-
.../drm/msm/disp/dpu1/catalog/dpu_1_14_msm8937.h | 3 +-
.../drm/msm/disp/dpu1/catalog/dpu_1_15_msm8917.h | 3 +-
.../drm/msm/disp/dpu1/catalog/dpu_1_16_msm8953.h | 3 +-
.../drm/msm/disp/dpu1/catalog/dpu_1_7_msm8996.h | 3 +-
.../drm/msm/disp/dpu1/catalog/dpu_3_0_msm8998.h | 3 +-
.../gpu/drm/msm/disp/dpu1/catalog/dpu_3_2_sdm660.h | 3 +-
.../gpu/drm/msm/disp/dpu1/catalog/dpu_3_3_sdm630.h | 3 +-
.../gpu/drm/msm/disp/dpu1/catalog/dpu_4_0_sdm845.h | 3 +-
.../gpu/drm/msm/disp/dpu1/catalog/dpu_4_1_sdm670.h | 3 +-
.../gpu/drm/msm/disp/dpu1/catalog/dpu_5_0_sm8150.h | 4 +-
.../drm/msm/disp/dpu1/catalog/dpu_5_1_sc8180x.h | 4 +-
.../gpu/drm/msm/disp/dpu1/catalog/dpu_5_2_sm7150.h | 4 +-
.../gpu/drm/msm/disp/dpu1/catalog/dpu_5_3_sm6150.h | 4 +-
.../gpu/drm/msm/disp/dpu1/catalog/dpu_5_4_sm6125.h | 4 +-
.../gpu/drm/msm/disp/dpu1/catalog/dpu_6_0_sm8250.h | 4 +-
.../gpu/drm/msm/disp/dpu1/catalog/dpu_6_2_sc7180.h | 4 +-
.../gpu/drm/msm/disp/dpu1/catalog/dpu_6_3_sm6115.h | 3 +-
.../gpu/drm/msm/disp/dpu1/catalog/dpu_6_4_sm6350.h | 4 +-
.../drm/msm/disp/dpu1/catalog/dpu_6_5_qcm2290.h | 3 +-
.../gpu/drm/msm/disp/dpu1/catalog/dpu_6_9_sm6375.h | 3 +-
.../gpu/drm/msm/disp/dpu1/catalog/dpu_7_0_sm8350.h | 4 +-
.../gpu/drm/msm/disp/dpu1/catalog/dpu_7_2_sc7280.h | 4 +-
.../drm/msm/disp/dpu1/catalog/dpu_8_0_sc8280xp.h | 3 +-
.../gpu/drm/msm/disp/dpu1/catalog/dpu_8_1_sm8450.h | 4 +-
.../drm/msm/disp/dpu1/catalog/dpu_8_4_sa8775p.h | 4 +-
.../gpu/drm/msm/disp/dpu1/catalog/dpu_9_0_sm8550.h | 4 +-
.../drm/msm/disp/dpu1/catalog/dpu_9_1_sar2130p.h | 4 +-
.../drm/msm/disp/dpu1/catalog/dpu_9_2_x1e80100.h | 4 +-
.../gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c | 7 +-
drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c | 35 ++---
drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h | 8 +-
drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h | 6 -
drivers/gpu/drm/msm/disp/dpu1/dpu_hw_vbif.c | 3 +-
drivers/gpu/drm/msm/disp/dpu1/dpu_hw_vbif.h | 1 -
drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 70 +++------
drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h | 4 +-
drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 5 +-
drivers/gpu/drm/msm/disp/dpu1/dpu_trace.h | 19 +--
drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.c | 163 ++++++++-------------
drivers/gpu/drm/msm/disp/dpu1/dpu_vbif.h | 4 -
44 files changed, 144 insertions(+), 296 deletions(-)
---
base-commit: 6de23f81a5e08be8fbf5e8d7e9febc72a5b5f27f
change-id: 20260219-drop-vbif-nrt-cb7da190f6f4
Best regards,
--
With best wishes
Dmitry